Resolv : hallando fracciones de igual denominado a. \( \frac{2}{3}+\frac{3}{4}=\frac{8}{5}-\frac{1}{2}= \)

3) Maurice has a pet hamster. In October he spent \( \$ 13.68 \) on hamster food \( \$ 7.89 \) on wood shavings \( \$ 21.14 \) on a new hamster wheel. About how much money did he spend on his hamster? Estimate by rounding each amount the nearest dollar. Exactly how much did he spend on his hamster in October?

4. Grandma's cookie recipe calls for \( 1 / 2 \) oup of oatmeal for every \( 3 / 4 \) cup of flour. How much flour will Grandma need if she uses 2 cups of oatmeal?

A train travels for 3.75 hours at 80 miles an hour. Use the formula \( d=r \cdot t \), where \( d= \) distance, \( r= \) rate, and \( t= \) time, to find the distance the train traveled. The distance traveled is miles. The solution is

Quantos números pares existem entre os números 157 e \( 707 ? \)

Determine a razão de uma PA que tem a1= \( =-8 \) e a17=16.